Total nitrogen monitor

1.Principle of total nitrogen monitor (resorcinol method)

The principle of the total nitrogen monitor is that after the water sample is mixed with the conditioner, the nitrate radical in the sample reacts with the indicator in an acidic environment and in the presence of an indicator to form a colored complex, and the analyzer detects the change in color. , and convert this change into nitrate value and output it. The amount of colored complex formed is equivalent to the total nitrogen amount. In an alkaline medium at 120°C, using potassium persulfate as an oxidant can not only convert ammonia nitrogen and nitrite nitrogen in the water into nitrates, but also convert most of the organic nitrogen into nitrates, and then use ultraviolet spectrophotometry to Measure absorbance at a specific wavelength

2. Product features of total nitrogen monitor

The new photoelectric quantitative technology is not affected by interference such as large chroma, suspended solids, and bubbles. It has high reliability, accuracy, and strong anti-interference ability.

The detection accuracy is high, the lower limit of measurement is low, and the long-term drift of the instrument is small.

It has one-click self-test function and self-diagnosis function.

Using a single-channel highly integrated valve group, maintenance and cleaning are simple and fast.

All-weather networking function allows you to monitor the operating status of the instrument anytime and anywhere.

It has alarm function, quality control function and reverse control function.

Equipped with automatic cleaning function and automatic calibration function.

Equipped with whole point measurement, interval measurement and external control measurement.

It will work automatically after power failure and recovery.

Automatic prompts and automatic reset functions for faults and lack of reagents (samples).

With fault recording function.

Can save more than 3 years of historical data.

Meet the requirements of separate discharge of cleaning liquid and waste liquid

3. Technical parameters of total nitrogen monitor

Measurement method: Alkaline potassium persulfate digestion UV spectrophotometry

Measuring range: 0-5 mg/L; 0-20 mg/L; 0-50 mg/L; range can be customized

Indication error: ≤±5% Detection limit: 0.01mg/L

Repeatability: ≤±3% Waste liquid volume: 6mL/time

Memory effect: ≤±1% Actual water sample comparison: ±10%

Constant temperature time: 900 seconds Voltage stability: ≤±5%

Measurement period: 51 minutes Calibration period: any specified time

Maintenance cycle: ≥720h/time Maintenance workload: <2 hours/month

Reagent consumption: 3 months/500ml Display output: Equipped with 10.1-inch color LCD touch screen

Color temperature: The recommended temperature is 125°C, which can be set according to the actual water sample conditions

Data export: Measured values ​​can be imported into a U disk and saved through the USB port.

Signal output: RS485/RS232/USB interface/standard configuration: 2 channels of 4-20mA output/standard configuration of two channels of switching input and output

Environmental requirements: Temperature-controlled indoors, recommended temperature (5-28°C), humidity ≦90% (no condensation)

Power supply and power: (220V±22)V/AC, (50±0.5Hz), 5A, 150W

Instrument size: upper cabinet 600*450*300mm; upper cabinet 700*450*300mm